IE812448L - T.v. distribution system - Google Patents

T.v. distribution system

Info

Publication number
IE812448L
IE812448L IE812448A IE244881A IE812448L IE 812448 L IE812448 L IE 812448L IE 812448 A IE812448 A IE 812448A IE 244881 A IE244881 A IE 244881A IE 812448 L IE812448 L IE 812448L
Authority
IE
Ireland
Prior art keywords
service
amplitude modulation
level
program
carrier
Prior art date
Application number
IE812448A
Other versions
IE52398B1 (en
Original Assignee
Gen Instrument Jerrold Div
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gen Instrument Jerrold Div filed Critical Gen Instrument Jerrold Div
Publication of IE812448L publication Critical patent/IE812448L/en
Publication of IE52398B1 publication Critical patent/IE52398B1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Systems (AREA)
  • Details Of Television Systems (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

A television signal distribution system protects outgoing programs from unauthorized reception; and marks or tags the conveyed signals with a digital word identifying the class of viewers authorized to receive the program ("level of service"). Basic encription is accomplished by effectively suppressing the horizontal and vertical synchronizing information. Horizontal sync information, and the program-characterizing level of service word which is interleaved in time with prescribed horizontal sync pulses, is distributed via pulse amplitude modulation of the audio carrier.At subscriber receiving stations, the sound carrier amplitude modulation is recovered to permit level of service authorization verification; and to reconstitute the video carrier to receivable form by an amplitude modulation which is the inverse of the sync-suppressing modulation of the head end.In accordance with one feature of the present invention, a further data channel may be employed to vary subscriber service authorizations - as to permit pay-per-view billing.
IE2448/81A 1980-12-10 1981-10-19 Protected television signal distribution system IE52398B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/215,044 US4621285A (en) 1980-12-10 1980-12-10 Protected television signal distribution system

Publications (2)

Publication Number Publication Date
IE812448L true IE812448L (en) 1982-06-10
IE52398B1 IE52398B1 (en) 1987-10-14

Family

ID=22801404

Family Applications (1)

Application Number Title Priority Date Filing Date
IE2448/81A IE52398B1 (en) 1980-12-10 1981-10-19 Protected television signal distribution system

Country Status (10)

Country Link
US (1) US4621285A (en)
EP (1) EP0053885B1 (en)
JP (1) JPS57121385A (en)
AT (1) ATE20799T1 (en)
AU (1) AU548313B2 (en)
CA (1) CA1193708A (en)
DE (1) DE3174941D1 (en)
IE (1) IE52398B1 (en)
MX (1) MX151201A (en)
NZ (1) NZ198731A (en)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131184A (en) * 1981-02-05 1982-08-13 Alps Electric Co Ltd Pay telecasting system
US4965825A (en) 1981-11-03 1990-10-23 The Personalized Mass Media Corporation Signal processing apparatus and methods
US7831204B1 (en) 1981-11-03 2010-11-09 Personalized Media Communications, Llc Signal processing apparatus and methods
USRE47642E1 (en) 1981-11-03 2019-10-08 Personalized Media Communications LLC Signal processing apparatus and methods
US4484217A (en) * 1982-05-11 1984-11-20 Telease, Inc. Method and system for remote reporting, particularly for pay television billing
JPS595790A (en) * 1982-07-01 1984-01-12 Pioneer Electronic Corp Scrambling method of television video
DE3240654A1 (en) * 1982-11-04 1984-05-10 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel METHOD FOR RE-ENGRAVING PRINT CYLINDERS
DE3242514A1 (en) * 1982-11-18 1984-05-24 Jungheinrich Unternehmensverwaltung Kg, 2000 Hamburg METHOD FOR MONITORING A COMMAND ARRANGEMENT AND CIRCUIT ARRANGEMENT FOR IMPLEMENTING THE METHOD
JPS5997289A (en) * 1982-11-26 1984-06-05 Sanyo Electric Co Ltd Catv decoder
DE3248146A1 (en) * 1982-12-27 1984-06-28 Martin 7516 Karlsbad Walter METHOD FOR TURNING OFF A TELEVISION RECEIVER
EP0123505B1 (en) * 1983-04-21 1989-09-27 General Instrument Corporation Scrambling system for television video signal
JPH0763159B2 (en) * 1984-10-12 1995-07-05 ソニー株式会社 Video receiver
US4688247A (en) * 1986-06-05 1987-08-18 Oak Industries Inc. Pay TV scrambling by audio encryption
US4937866A (en) * 1986-08-13 1990-06-26 U.S. Philips Corporation System for decoding transmitted scrambled signals
GB8619737D0 (en) * 1986-08-13 1986-09-24 Philips Electronic Associated Business management
GB2231755B (en) * 1989-04-21 1993-10-06 Pioneer Electronic Corp Method for scrambling a television signal and method and apparatus for descrambling a scrambled television signal
US5027426A (en) * 1989-07-07 1991-06-25 Chiocca Jr Joseph J Signal coupling device and system
JP2697231B2 (en) * 1990-03-12 1998-01-14 松下電器産業株式会社 CATV system
JPH03291083A (en) * 1990-04-09 1991-12-20 Matsushita Electric Ind Co Ltd Key signal converter for catv system
IL102023A (en) * 1991-06-13 1995-03-30 Gen Instrument Corp Method and apparatus for frustrating vertical interval detection in scrambled television signals
US10361802B1 (en) 1999-02-01 2019-07-23 Blanding Hovenweep, Llc Adaptive pattern recognition based control system and method
US7242988B1 (en) 1991-12-23 2007-07-10 Linda Irene Hoffberg Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore
US5903454A (en) 1991-12-23 1999-05-11 Hoffberg; Linda Irene Human-factored interface corporating adaptive pattern recognition based controller apparatus
US6400996B1 (en) 1999-02-01 2002-06-04 Steven M. Hoffberg Adaptive pattern recognition based control system and method
US6418424B1 (en) 1991-12-23 2002-07-09 Steven M. Hoffberg Ergonomic man-machine interface incorporating adaptive pattern recognition based control system
US6850252B1 (en) 1999-10-05 2005-02-01 Steven M. Hoffberg Intelligent electronic appliance system and method
US8352400B2 (en) 1991-12-23 2013-01-08 Hoffberg Steven M Adaptive pattern recognition based controller apparatus and method and human-factored interface therefore
US6732366B1 (en) * 1995-02-24 2004-05-04 James Russo Stored program pay-per-play
US5619247A (en) * 1995-02-24 1997-04-08 Smart Vcr Limited Partnership Stored program pay-per-play
US5862219A (en) * 1995-05-12 1999-01-19 General Instrument Corporation Cable television setback decoder automatic control
US5710815A (en) * 1995-06-07 1998-01-20 Vtech Communications, Ltd. Encoder apparatus and decoder apparatus for a television signal having embedded viewer access control data
US6020910A (en) * 1996-09-20 2000-02-01 Soundview Technologies Incorporated Broadcast signal receiver retrofit apparatus and method
US6081290A (en) * 1996-09-20 2000-06-27 Soundview Technologies Incorporated Broadcast signal receiver retrofit apparatus and method
US8364136B2 (en) 1999-02-01 2013-01-29 Steven M Hoffberg Mobile system, a method of operating mobile system and a non-transitory computer readable medium for a programmable control of a mobile system
US7904187B2 (en) 1999-02-01 2011-03-08 Hoffberg Steven M Internet appliance system and method
US9107030B2 (en) 2000-12-13 2015-08-11 Thomas E. Coverstone Communication system for sending advertisements based on location determination and previously specified user selections
EP1313335A1 (en) * 2001-11-19 2003-05-21 Siemens Aktiengesellschaft Method, apparatus and program for determining and checking a permission to set up a connection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3184537A (en) * 1960-10-04 1965-05-18 Paramount Pictures Corp Subscription-television system employing suppression of synchronizing signals
US3530232A (en) * 1966-06-17 1970-09-22 Intern Telemeter Corp Subscription television system
US3919462A (en) * 1973-08-15 1975-11-11 System Dev Corp Method and apparatus for scrambling and unscrambling communication signals
US4115807A (en) * 1976-07-19 1978-09-19 Pires H George Telephone billing apparatus for a subscription television system
US4068264A (en) * 1976-07-19 1978-01-10 Teleglobe Pay-Tv System, Inc. Pay television system utilizing binary coding
US4095258A (en) * 1976-10-15 1978-06-13 Blonder-Tongue Laboratories, Inc. Apparatus for decoding scrambled television and similar transmissions
US4163252A (en) * 1976-11-03 1979-07-31 Blonder-Tongue Laboratories, Inc. Subscription television decoder apparatus
US4145717A (en) * 1977-05-11 1979-03-20 Oak Industries Inc. Subscription TV audio carrier recovery system
IL58735A (en) * 1978-12-04 1982-01-31 Oak Industries Inc Subscription television coding system
CA1155518A (en) * 1979-02-20 1983-10-18 William S.H. Cheung Encoding of information

Also Published As

Publication number Publication date
AU548313B2 (en) 1985-12-05
MX151201A (en) 1984-10-09
ATE20799T1 (en) 1986-08-15
EP0053885B1 (en) 1986-07-16
US4621285A (en) 1986-11-04
CA1193708A (en) 1985-09-17
DE3174941D1 (en) 1986-08-21
IE52398B1 (en) 1987-10-14
EP0053885A2 (en) 1982-06-16
JPS57121385A (en) 1982-07-28
AU7662681A (en) 1982-06-17
JPS6358514B2 (en) 1988-11-16
EP0053885A3 (en) 1982-08-04
NZ198731A (en) 1985-05-31

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Legal Events

Date Code Title Description
MM4A Patent lapsed